Lock for bicycles.



Patent''d July I0, moo.

F. H. GARDNER. LOCK FDR BIGYCLES.

(Application filed Dec. 16, 1899.)

(No llodel.)

TERS co mmou mo', WA$HINOTOm a c.

STATES PATENT OFFlCE.

FRANK H. GARDNER, OF JACKSON, MICHIGAN.

LOOK FOR BICYCLES'.

SPECIFICATION forming part of Letters Patent No. 653,230, dated July 10,1900.

Application filed December 16, 1899- serial No. 740,613. (No model.)

To aZZ whom it may concern.-

Be it known that I, FRANK H. GARDNER, a citizen of the United States,residing at the city of Jackson, Jackson county, State of Michigan, haveinvented a new and useful Combination-Lock for Bicycles, of which thefollowing is a specification, viz

- My invention is a combination-lock for bicycles, its object being toprovide means for momentarily locking the bicycle when not desired foruse and as easily and quickly unlocking it, thereby doing away with useof a chain and padlock, and to so construct said locking means that noperson unacquainted with the combination would be able to unlock thesame. This I accomplish by inserting the lock in the sprocket-wheel.

My invention also relates to the particular construction, arrangement,and combination hereinafter shown and described, whereby the device issimple, durable, and useful.

In the drawings, Figure 1 is a vertical section of a sprocket-wheelprovided with my invention. Fig. 2 is an elevation of part 4. Fig. 3 isa detail of part 5. Fig. 4 is a top View of part 5 with parts brokenaway. Fig. 5 is a detail of sprocket-wheel construction with partsbroken away. Fig. 6 is a detail of part 4'.

1 is a sprocket-wheel on the pedal crank shaft 2. The hub of the wheelis enlarged and provided with a large circular cavity opening on oneside of the wheel, as illustrated in Fig. 5. Covering this cavity andforming the outer surface of this side of the Wheel are two flattumblers 4 and 5, 4 being the tumbler nearer to the shaft 2. Thesetumblers lap upon each other, and the outer edge of tumbler 5 fits intoan offset in inner edge of the wheel, thereby being flush and true andforming an even surface of the wheel over the said cavity.

1' is a collar keyed to the shaft 2 and against the hub of wheel 1 andtumbler 4, thereby holding the tumbler 4 and by it the tumbler 5 inposition.

3 may be the frame of the bicycle or a washer or the boxing of the shaft2 in the frame. It is provided with a number of slots 7 in its side nextthe sprocket-wheel for the purpose of receiving the end of thelockingis'moved from the inside of the sprocket-' wheel outward intoengagement with the part 3,as mentioned. This bolt 6 is moved in and outof engagement as desired and when in engagement the wheel is locked andcannot be unlocked until some one acquainted with the combinationhereinafter described turns the mechanism.

The tumbler 4 has an internal attachment 4, provided with acircumferential rib 12, forming the space 10 between the tumbler4 andthe rib 12. Through this rib 12 an an gular slot 11 iscut, as showninFig. 2, and in the space or groove 10 a diagonal rib 10 forms anextension of one of the angular-sides of the slot 11. This slot 11 issomewhat larger than the head 14 of the bolt 6, and the groove 10 iswider than the depth of the head 14, and when the bolt 6 is withdrawnfrom engagement with the part 3 its head 14 passes into the groove 10through the slot 11 and is held therein until the tumbler, is turned sothat the rib 10 engages the head 14 and forces it downward through theslot 11 and into one of the holes 7 in the part 3. surface of the rib 12are the radial corrugations 13 and on the top of the bar-head. 14 is rib14, which under circumstances hereinafter described will engage one ofthe corrugations 13 and prevent the bar from being withdrawn and thetumbler 4 from being turned.

On the inside of tumbler 5 is the curved projection 9, extendinginwardly and concentric to the tumbler and having the beveled ends 9'.This projection 9 extends to and engages the inner edge of the head 14and as the tumbler 5 is turned will crowd under it and force the bolt 6backward, the head sliding upward on one of the stopping edges 9.

If tumbler 4 is set as shown in Fig.1, the head 14 will be raised untilthe rib 14 enters one of the corrugations 13 on the rib 12, andthus-preventthe bolt 6 being withdrawn. If, however, the tumbler 4 beset so that the slot 11 is over the head 14 and the tumbler 5 is thenturned, the extension 9 will crowd the head 14 backward through the slotinto the groove 10, and then turning, the tumbler4 will place the rib 12underneath the edges of the head, thereby holding it and the bolt fromOn the inner again passing into lockingposition untilboth the tumblersare turned to the proper pointviz., the tumblers 5 turned so that theextension 9 is withdrawn from the path of the head-When turning thetumbler 4 backward will force the bolt-head 14 out of the slot 11 andinto slot 7, and thereby lock the wheel.

By graduating the outer surfaces of the tumblers4 and 5 similar to thedials of asafe combination-lock, with the width of the graduated spacesequal to the width of the slot 11 and the edges 9, respectively, thenumber on the dial 4 will indicate the point to which it must be turnedto place it over the head of the bolt-head 14, and the point or numberover the edge 9 will indicate the front to which the tumbler 5 must beturned for it (9) to engage the head of the bar 6. Thegraduated surfacesof these tumblers are not shown in the drawings, but will be readilycomprehended.

15 is a knob on theoutside of tumbler 5, extending to an eccentric-shoe15 on inside of the tumbler 5 and adapted to engage the corrugations 17on the inner edge of the cavity of the wheel, whereby the tumbler 5 maybe prevented from revolving when the wheel is in motion. Means may alsobe provided for locking the tumbler t; but it is not probable that themotion of the wheel would turn both the tumblers so that thelocking-bolt 6 would be moved into locking position. 16 is a knob onouter surface of tumbler 4 for turning the same, the knob 15 being usedalso for turning the tumbler 5 after the eccentric 15 has been turnedout of engagement with 17.

In order that the combination may be changed, I secure theattachment-carrying rib 12 and the projection 9 to their tumblers bymeans of screws, so that their position on the tumblers may be varied asdesired.

It is obvious that other means may be provided for actuating the bolt 6,such as would be suggested by experience or mechanical skill, withoutdeparting from the object and principle of my invention.

It is immaterial which wheel be provided with the lock mechanism.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent,-is-

1. In a lock for bicycles, a sprocket-wheel, a lock-bolt mounted in saidsprocket-wheel and adapted to be moved into engagement with thebicycle-frame, a permutation-tumbler on the sprocket-wheel, and meanscarried by said permutation-tumbler for operating said locking-bolt asdescribed.

2. In a lock for bicycles, a sprocket-wheel, a lock-bolt mounted in thesprocket-wheel and adapted to be moved into engagement with thebicycle-frame, one or more permutation-tumblers in the sprocket-wheel,and means controlled by said tumblers for operating said locking-bolt,as described.

3. In a lock for bicycles a sprocket-Wheel, a lock-bolt mounted in thesprocket-wheel and adapted to be moved into engagement with the frame,and means in the sprocketwheel for operating said lock bolt asdescribed.

In testimony whereof I h'ave subscribed my name in presence of twowitnesses.

FRANK H. GARDNER.

